I don't know what the price is, but this is just a related comment. (I don't know if you actually possess one) Isn't it pretty much not worth it to go over around 35 dex on a sauna/bath robe? I mean, let's say you have a robe thats 20-35 dex. its usable by all the non-mage classes. Let's say as a warrior or thief, you're aiming for 120 dex from equips, and you can reach that with a <= 35 dex robe. A 35+ dex robe would then become mostly just useful for archers and pirates, but at that point, you might as well get well scrolled class specific clothes. It will provide you with more bang for your buck. There wouldn't be much reason to buy a 35+ stat non-int bath/sauna robe since secondary stat classes wouldn't need it and primary stat classes could get better class specific clothes. So no one would want to buy one or have an incentive to try to make one.
Thanks for the detailed response. I was inquiring for my thief. How much, then, would a 35 dex sauna robe go for?
35 would go for 500-700m you have to remember that sauna robe is not an endgame equip, if it was it would be worth double that.